Reviewed Scientific Publications
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V. Gomer, F. Strauch, B. 脺berholz, S. Knappe, D. Meschede, Single-atom dynamics revealed by photon correlations, Phys. Rev. A, 58, R1657-R1660 (1998).
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V. Gomer, B. 脺berholz, S. Knappe, F. Strauch, D. Frese, D. Meschede, Decoding the dynamics of a single trapped atom from photon correlations, Appl. Phys. B 67, 689-697 (1998).
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C. Affolderbach, A. Nagel, S. Knappe, C. Jung, D. Wiedenmann, R. Wynands, Nonlinear spectroscopy using a vertical-cavity surface-emitting laser (VCSEL), Appl. Phys. B 70, 407-413 (2000).
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A. Nagel, C. Affolderbach, S. Knappe, R. Wynands, Influence of excited state hyperfine structure on ground state coherence, Phys. Rev. A 61, 012504 (2000).
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S. Knappe, W. Kemp, C. Affolderbach, A. Nagel, R. Wynands, Splitting of coherent population trapping resonances by the nuclear magnetic moment, Phys. Rev. A 61, 012508 (2000).
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J. Kitching, S. Knappe, N. Vuki膰evi膰, L. Hollberg, R. Wynands, W. Weidemann, A microwave frequency reference based on VCSEL-driven dark line resonances in Cs vapor, IEEE Trans. Instrum. Meas. 49, 1313-1317, (2000).
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S. Knappe, R. Wynands, J. Kitching, H. G. Robinson, L. Hollberg, Characterization of coherent population trapping resonances as atomic frequency references, J. Opt. Soc. Am. B 18, 1545-1553 (2001).
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M. St盲hler, S. Knappe, C. Affolderbach, W. Kemp, R. Wynands, Picotesla magnetometry with coherent dark states, Europhys. Lett. 53, 323-328 (2001).
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J. Kitching, H. G. Robinson, L. Hollberg, S. Knappe, R. Wynands, Optical pumping noise in laser-pumped, all-optical microwave frequency references, J. Opt. Soc. Am. B 18, 1676-1683 (2001).
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J. Kitching, L. Hollberg, S. Knappe, R. Wynands, Frequency-dependent optical pumping effects in atomic 螞-systems, Opt. Lett. 26,1507-1509 (2001).
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J. Kitching, L. Hollberg, S. Knappe, R. Wynands, A compact atomic clock based on coherent population trapping, Electron. Lett.37, 1449-1451 (2001).
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S. Knappe, J. Kitching, L. Hollberg, R. Wynands, Temperature dependence of coherent population trapping resonances, Appl. Phys. B 74, 217-222 (2002).
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C. Affolderbach, S. Knappe, A. V. Taichenachev, V. I. Yudin, R. Wynands, Electromagnetically induced transparency and absorption in a standing wave, Phys. Rev. A 65, 043810 (2002).
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M. St盲hler, R. Wynands, S. Knappe, J. Kitching, L. Hollberg, A. Taichenachev, V. Yudin, Coherent population trapping resonances in thermal 85Rb vapor: D1 versus D2 line excitation, Opt. Lett. 27, 1472-1474 (2002).
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C. Affolderbach, M. St盲hler, S. Knappe, R. Wynands, An all-optical, high-sensitivity magnetic gradiometer, Appl. Phys. B, published on-line on Nov. 15, 2002.
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J. Kitching, S. Knappe, L. Hollberg , Miniature vapor-cell atomic frequency references, Appl. Phys. Lett. 81, 553-555 (2002).
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S. Knappe, M. St盲hler, C. Affolderbach, A. V. Taichenachev, V. I. Yudin, R. Wynands, Simple parametrization of dark-resonance line shapes, Appl. Phys. B 76, 57-63 (2003) .
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S. Knappe, V. Velichansky, H.G. Robinson, J. Kitching, L. Hollberg, Compact atomic vapor cells fabricated by laser-induced heating of hollow-core glass fibers, Rev. Sci. Instum. 74, 3142-3145 (2003).
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S. Knappe, L. Hollberg, J. Kitching, Dark Line Resonances in Sub-Millimeter Structures, Opt. Lett. 29, 388-390 (2004).
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L.-A. Liew, S. Knappe, J. Moreland, H. Robinson, L. Hollberg, J. Kitching, Microfabricated Alkali Atom Vapor Cells, Appl. Phys. Lett. 84, 2694-2696 (2004).
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S. Knappe, V. Shah, P. Schwindt, L. Hollberg, J. Kitching, L.-A. Liew, J. Moreland, A Microfabricated Atomic Clock, Appl. Phys. Lett. 85, 1460-1462 (2004).
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P. D. D. Schwindt, S. Knappe, V. Shah, L. Hollberg, J. Kitching, L.-A. Liew, J. Moreland, A Chip-Scale Atomic Magnetometer ,Appl. Phys. Lett. 85, 6409-6411 (2004).
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S. Knappe, P. D. D. Schwindt, V. Shah, L. Hollberg, J. Kitching, L. Liew, J. Moreland, A chip-scale atomic clock based on 87Rb with improved frequency stability, Opt. Express 14, 1249-1253 (2005).
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S. Knappe, V. Gerginov, P. Schwindt, V. Shah, L. Hollberg and J. Kitching, Atomic vapor cells for chip-scale atomic clocks with improved long-term frequency stability, Opt. Lett. 30, 2351-2354 (2005).
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V. Gerginov, S. Knappe, P. Schwindt, V. Shah, L.W. Hollberg and J. Kitching, Long-term frequency instability of CPT clocks with microfabricated vapor cells, J. Opt. Soc. Am. B 23, 593-597 (2006).
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M. Rosenbluh, V. Shah, S. Knappe, and J. Kitching, Differential Coherent Population Trapping Resonances Excited by Orthogonally Polarized Laser Fields, Opt. Expr. 14, 6588-6594 (2006).
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V. Shah, S. Knappe, P. Schwindt, V. Gerginov, and J. Kitching, Compact phase delay technique for increasing the amplitude of coherent population trapping resonances in open Lambda systems, Opt. Lett. 31, 2335-2337 (2006).
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S. Knappe, P. Schwindt, V. Gerginov, V. Shah, H.G. Robinson, L. Hollberg, L. Liew and J. Moreland, Microfabricated atomic clocks and magnetometers, J. Opt. A, Special Issue: Optical MEMS, S318-S322 (2006).
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V. Gerginov, V. Shah, S. Knappe, L.W. Hollberg and J. Kitching, Atom-based stabilization for laser-pumped atomic clocks, Opt. Lett. 31, 1851-1853 (2006).
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Y. Wang, M. Eardley, S. Knappe, J.M. Moreland, L. Hollberg, and J. Kitching, Magnetic resonance in atomic vapor excited by a mechanical resonators, Phys. Rev. Lett. 97, 227602 (2006).
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V. Shah, V. Gerginov, P.D. Schwindt, S. Knappe, L. Hollberg, and J. Kitching, Continuous Light Shift Correction in Modulated CPT Clocks, Appl. Phys. Lett. 89, 151124 (2006).
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P.D. Schwindt, B. Lindseth, S. Knappe, V. Shah, J. Kitching, and L. Liew, A chip-scale atomic magnetometer with improved sensitivity using the Mx technique, Appl. Phys. Lett. 90, 081102 (2007).
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S. Knappe, H.G. Robinson, L. Hollberg, Microfabricated Saturated Absorption Spectroscopy, Opt. Expr. 15, 6293-9 (2007).
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V. Shah, S. Knappe, L. Hollberg, J. Kitching, High contrast coherent population trapping resonances using four-wave mixing in 87Rb, Opt. Lett., 32, 1244-6 (2007).
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V. Gerginov, V. Shah, S. Knappe, L. Hollberg, J. Kitching, Laser noise cancellation in single-cell CPT clocks, IEEE Trans. Instrum. Meas., 57, 1357-1361 (2007).
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V. Shah, S. Knappe, P.D. Schwindt, L. Hollberg, and J. Kitching, Subpicotesla atomic magnetometry with a microfabricated vapor cell, Nature Photonics 1, 649-652 (2007).
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M.P. Ledbetter, I.M. Savukov, D. Budker, V. Shah, S. Knappe, J. Kitching, D. Michalak, S. Xu, and A. Pines, Zero-field remote detection of NMR with a microfabricated atomic magnetometer, Proc. Natl. Acad. Sci. U.S.A., 105, 2286-2290 (2008).
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E.J. Eklund, A.M. Shkel, S. Knappe, E.A. Donley, and J. Kitching, Glass-blown spherical microcells for chip-scale atomic devices, Sensors and Actuators A: Physical, 143, 175-180 (2008).
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Y.W. Yi, H.G. Robinson, S. Knappe, J. Maclennan, C.D. Jones, C. Zhu, N.A. Clark, and J. Kitching, Method for characterizing self-assembled monolayers as antirelaxation wall coatings for alkali vapor cells, J. Appl. Phys. 104, 023534 (2008).
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K. Watabe, T. Ikegami, A. Takamizawa, S. Yanagimachi, S. Ohshima and S. Knappe, High-contrast Dark Resonance in Bichromatic Linearly Polarized Optical Field on Cs D1 Line, Appl. Opt. 48, 1098-1103 (2009).
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W.C. Griffith, R. Jimenez, S. Knappe, and J. Kitching, V. Shah, Miniature atomic magnetometer integrated with flux concentrators, Appl. Phys. Lett. 94, 023502 (2009).
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D.M. Rampulla, N. Oncel, E. Abelev, Y. Yi, S. Knappe, and S. Bernasek, Effects of Organic Film Morphology on the Formation of Rb Clusters on Surface Coatings used in Alkali Metal Atom Magnetometer Cells, Appl. Phys. Lett 94, 041116 (2009).
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M.P. Ledbetter, C.W. Crawford, A. Pines, D.E. Wemmer, S. Knappe. J. Kitching, and D. Budker, Optical detection of scalar coupling at zero magnetic field, J. Mag. Res. 199, 25-9 (2009).
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M.A. Perez, U. Nguyen, S. Knappe, E.A. Donley, J. Kitching, and A.M. Shkel, Rubidium Vapor Cell with Integrated Bragg Reflectors for Compact Atomic MEMS, Sens. and Act., 154, 295-303 (2009).
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R. Jimenez, W.C. Griffith, Y. Wang, S. Knappe, J. Kitching, K. Smith, and M. Prouty, Sensitivity Comparison of Mx and Frequency Modulated Bell-Bloom Cs Magnetometers in a Micro-Fabricated Cell, IEEE Trans. Instrum. Meas. 59, 372 (2010).
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R. Jimenez, W.C. Griffith,, S. Knappe, J. Kitching, Conversion of laser frequency noise to optical rotation noise in a Cs vapor cell, Opt. Lett. 34, 2519 (2009).
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S. Knappe, H. Robinson, Double-resonance lineshape in a cell with wall coating and buffer gas, New Journal of Physics 12, 065021 (2010).
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S. Knappe, T.H. Sander, O. Kosch, F. Wiekhorst, J. Kitching and L. Trahms, Cross-validation of microfabricated atomic magnetometers with superconducting quantum interference devices for biomagnetic applications, Appl. Phys. Lett. 97, 133703-3 (2010).
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W.C. Griffith, S. Knappe, and J. Kitching, Femtotesla atomic magnetometry in a microfabricated vapor cell, Opt. Exp. 18, 27167-27172 (2010).
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C. Lee, G.Z. Iwata, E. Corsini, J.M. Higbie, S. Knappe, M.P. Ledbetter, and D. Budker, Small-sized Dichroic Atomic Vapor Laser Lock (DAVLL), Rev. Sci. Instrum. 82, 043107 (2011).
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T. Theis, P. Ganssle, G. Kervern, S. Knappe, and J. Kitching, M.P. Ledbetter, D. Budker, A. Pines, Parahydrogen-enhanced zero-field nuclear magnetic resonance, Nature Physics 7, 571-575 (2011).
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J. Kitching, S. Knappe, and E. Donley, Atomic Sensors - A review, J. IEEE Sensors 11, 1749-1758 (2011).
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D. Maser, S. Pandey, H. Ring, M. P. Ledbetter, S. Knappe, J. Kitching, and D. Budker, Detection of a single cobalt microparticle with a microfabricated atomic magnetometer, Rev. Sci. Instrum. 82, 086112 (2011).
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T.H. Sander, J. Preusser, R. Mhaskar, J. Kitching, L. Trahms, and S. Knappe, Magnetoencephalography with a chip-scale atomic magnetometer, Biomed. Opt. Express 3, 981-990 (2012).
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R. Jimenez, S. Knappe, J. Kitching, and M. Prouty, High-bandwidth optical magnetometer, J. Opt. Soc. Am B 29, 3398-3403 (2012).
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L. Weller, K. Kleinbach, M. Zentile, S. Knappe, I. Hughes, and C. Adams, An optical isolator using an atomic vapor in the hyperfine Paschen-Back regime, Opt. Lett. 37, 3405-3407 (2012).
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L. Weller, K. Kleinbach, M. Zentile, S. Knappe, I. Hughes, and C. Adams, Absolute absorption and dispersion of a rubidium vapour in the hyperfine Paschen-Back regime, J. Phys. B 45, 215005 (2012).
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R. Mhaskar, S. Knappe, and J. Kitching, A low-power high-sensitivity micromachined optical magnetometer, Appl. Phys. Lett. 101, 241105 (2012).
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M. Zentile, R. Andrews, L. Weller, S. Knappe, C. Adams and I. Hughes, The hyperfine Paschen-Back Faraday effect, J. Phys. B. 47, 075005 (2014)..
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R. Jim茅nez-Mart铆nez, D.. Kennedy, M. Rosenbluh, E. Donley, S. Knappe, S. Seltzer, H. Ring, V. Bajaj, and J. Kitching, Optical hyperpolarization and NMR detection of 129Xe on a microfluidic chip, Nature Communications 5, 3908 (2014). doi:10.1038/ncomms4908
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R. Jimemez, S. Knappe, and J. Kitching, An optically modulated zero-field atomic magnetometer with suppressed spin-exchange broadening, Rev. Sci Instrumen. 85, 045124 (2014).
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P.J. Ganssle, H.D. Shin, S.J. Seltzer, V.S. Bajaj, M.P. Ledbetter, D. Budker, S. Knappe, J. Kitching, and A. Pines, Ultra-Low-Field NMR Relaxation and Diffusion Measurements Using an Optical Magnetometer.鈥 Angewandte Chemie International Edition (cover article), July 31, 2014. doi:10.1002/anie.201403416.
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O. Alem, A. Benison, D. Barth, J. Kitching, and S. Knappe, Magnetoencephalography of epilepsy with a microfabricated atomic magnetrode, J. Neuroscience 34, 14324-27 (2014).
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O. Alem, T.H. Sander, R. Mhaskar, J. LeBlanc, H. Eswaran, U. Steinhoff, Y. Okada, J. Kitching, L. Trahms, and S. Knappe, Fetal magnetocardiography measurements with an array of microfabricated optically-pumped magnetometers, Phys. Med. Biol. 69, 4797-4811 (2015).
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A. Dellis, V. Shah, E. Donley, S. Knappe, J. Kitching, Low helium permeation cells for atomic microsystems technology, Opt. Lett. 41, 2775-8 (2016).
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D. Kennedy, S. Seltzer, R. Jimenez-Martinez, B. Patton, H. Ring, N. Malecek, S. Knappe, E. Donley, J. Kitching, V. Bajaj, and A. Pines, An optimized microfabricated platform for the optical generation and detection of hyperpolarized129Xe, Scientific Reports 7, 43994 (2017).
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E. Boto, S. Meyer, V. Shah, O. Alem, S. Knappe, P. Kruger, M. Fromhold, M. Lim, P. Glover, P. Morris, R. Bowtell, G. Barnes, M. Brookes, A New Generation of Magnetoencephalography: Room Temperature Measurements using Optically-Pumped Magnetometers, NeuroImage,149, 404 (2017).
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D. Sheng, A. Perry, S. Krzyzewski, S. Geller, J. Kitching, S.Knappe, A microfabricated optically-pumped magnetic gradiometer, Appl. Phys. Lett. 110, 031106 (2017)
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O. Alem, R. Mhaskar, R. Jimenez-Martinez, D. Sheng, J. LeBlanc, L. Trahms, T. Sander, J. Kitching, S. Knappe, Magnetic field imaging with microfabricated optically-pumped magnetometers, Optics Express 25, 282368 (2017).
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V. Gerginov, S. Krzyzewski, S. Knappe, A Pulsed operation of a miniature scalar optically pumped magnetometer, Journal of the Optical Society of America B 34, 1429-1434 (2017)
Other Scientific Publications
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J. Kitching, N. Vukicevic, L. Hollberg, S. Knappe, C. Affolderbach, R. Wynands, and W. Weidemann, Microwave Frequency Reference Based on VCSEL-Driven Dark Line Resonances in Cs Vapor, Proc. 2000 IEEE International Frequency Control Symposium (FCS).
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J. Kitching, H.G. Robinson, L. Hollberg, S. Knappe, and R. Wynands, Compact Microwave Frequency Reference Based on Coherent Population Trapping, Proc. 2001 Frequency Standards Metrology Symposium.
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J. Kitching, S. Knappe, and L. Hollberg, Performance of Small Scale-Frequency References, Proc. 2002 IEEE International Frequency Control Symposium (FCS).
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S. Knappe, V. Velichansky, H.G. Robinson, L. Liew, J. Moreland, J. Kitching, and L. Hollberg, Atomic Vapor Cells for Miniature Frequency References, Proc. 2003 Joint Mtg. IEEE International Frequency Control Symposium (FCS) and European Frequency and Time Forum (EFTF).
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J. Kitching, S. Knappe, L. Liew, J. Moreland, S. Kargopoltsev, V. Velichansky, H.G. Robinson, and L. Hollberg, Ultra-small atomic clocks based on coherent population trapping and micromachined vapor cells, Proc. 2003 International Conference on Laser Spectroscopy (ICOLS).
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L. Liew, S. Knappe, J.M. Moreland, H.G. Robinson, L. Hollberg, and J. Kitching, Micromachined Alkali Atom Vapor Cells For Chip-Scale Atomic Clocks, Proc. 2004 International Conference Microelectromechanical Systems (MEMS)
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J. Kitching, S. Knappe, L. Liew, J. Moreland, H.G. Robinson, P. Schwindt, V. Shah and L. Hollberg, Microfabricated Atomic Frequency References, Proc. 2004 European Frequency and Time Forum (EFTF).
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S. Knappe, P. Schwindt, V. Shah, L. Hollberg, J. Kitching, L. Liew, and J. Moreland, Microfabricated Atomic Frequency References, Proc. 2004 IEEE UFFC Joint 50th Anniv. Conf.
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J. Kitching, S. Knappe, L.-A. Liew, P. Schwindt, V. Shah, J. Moreland, and L. Hollberg, Power dissipation in a vertically-integrated chip-scale atomic clock, Proc. 2004 IEEE UFFC Joint 50th Anniv. Conf.
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S. Knappe, P. D. D. Schwindt, V. Gerginov, V. Shah, L. Hollberg, J. Kitching, L. Liew, J. Moreland, Microfabricated atomic clocks at NIST, Proc. 2004 Precision Time and Time Interval (PTTI) Mtg.
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J. Kitching, S. Knappe, L. Liew, P. Schwindt, V. Shah, J.M. Moreland, L. Hollberg, Microfabricated Atomic Clock, Proc. 2005 IEEE International Conference Microelectromechanical Systems (MEMS).
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J. Kitching, S. Knappe, L. Liew, J. Moreland, P. Schwindt, V. Shah, V. Gerginov, L. Hollberg, Microfabricated Atomic Clocks, Metrologia, vol. 42 (3), June 2005
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J. Kitching, S. Knappe, L. Liew, J. Moreland, H.G. Robinson, P. Schwindt, V. Shah, V. Gerginov, and L. Hollberg, Chip-Scale Atomic Frequency References: Fabrication and Performance, Proc. 2005 European Frequency and Time Forum (EFTF).
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S. Knappe, P. Schwindt, V. Gerginov, V. Shah, H.G. Robinson, L. Hollberg, and J. Kitching, Microfabricated Atomic Clocks and Magnetometers, Proc. 2005 International Conference on Laser Spectroscopy (ICOLS).
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J. Kitching, S. Knappe, L. Liew, J. Moreland, H.G. Robinson, P. Schwindt, V. Shah, V. Gerginov, and L. Hollberg, Chip-Scale Atomic Clocks at NIST, Proc. 2005 National Conference of Standards Laboratories International (NCSLI).
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V. Gerginov, S. Knappe, P. Schwindt, V. Shah, L. Liew, J.M. Moreland, H.G. Robinson, L. Hollberg, J. Kitching, A. Brannon, J. Breitbarth, and Z. Popovic, Component-Level Demonstration of a Microfabricated Atomic Frequency Reference, Proc. 2005 Joint Mtg. IEEE International Frequency Control Symposium (FCS) and Precision Time and Time Interval (PTTI) Mtg.
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J. Kitching, S. Knappe, L. Liew, P. Schwindt, V. Gerginov, V. Shah, J. Moreland, A. Brannon, J. Breitbarth, Z. Popovic, and L. Hollberg, Chip-Scale Atomic Frequency References, Proc. 2005 Institute Of Navigation Global Navigation Satellite Syaytems (ION GNSS) Mtg.
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J. Moreland, J. Kitching, P. D. D. Schwindt, S. Knappe, L. Liew, V. Shah, V. Gerginov, Y.-J. Wang, and L. Hollberg, Chip-Scale Atomic Magnetometers, Meeting of the Military Sensing Symposia (MSS) Specialty Group on Battlefield Acoustic and Seismic Sensing, Magnetic and Electric Field Sensors (BAMS), Laurel, MD, 2005.
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S. Knappe, P. Schwindt, L. Hollberg, J. Kitching, V. Shah and V. Gerginov, Performance of Chip-Scale Atomic Clocks, Proc. 2005 Quantum Electronics and Laser Science Conference (QELS), 479-481.
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P. Schwindt, S. Knappe, V. Shah, L. Hollberg, J. Kitching, L. Liew, and J. Moreland, Microfabricated Atomic Magnetometers, Proc. 2005 IEEE Sensors Conference, 73-76.
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J. Kitching, S. Knappe, P. Schwindt, Y. Wang, H.G. Robinson, L. Hollberg, L. Liew, J.M. Moreland, A. Brannon, J. Breitbath, B. Lindseth, Z. Popovic, V. Shah, V. Gerginov, and M. Eardley, Chip-Scale Atomic Devices, 2006 Solid State Sensors, Actuators, and Microsystems Workshop.
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V. Gerginov, V. Shah, S. Knappe, L. Hollberg, and J. Kitching, Atom-based stabilization for laser-pumped atomic clocks, Proc. 2006 European Frequency and Time Forum (EFTF).
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V. Shah, P.D. Schwindt, V. Gerginov, S. Knappe, L. Hollberg, and J. Kitching, Active light-shift stabilization in modulated CPT clocks, Proc. 2006 International Frequency Control Symposium (FCS).
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A. Brannon, J. Breitbarth, Z. Popovic, V. Gerginov, V. Shah, S. Knappe, L. Hollberg, and J. Kitching, A Local Oscillator for Chip-Scale Atomic Clocks at NIST, Proc. 2006 International Frequency Control Symposium (FCS).
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S. Knappe, P.D. Schwindt, V. Gerginov, V. Shah, A. Brannon, B. Lindseth, L. Liew, H.G. Robinson, J.M. Moreland, Z. Popovic, L. Hollberg and J. Kitching, Chip scale atomic devices at NIST, Proc. 2006 International School of Quantum Electronics (ISQE).
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V. Gerginov, S. Knappe, V. Shah, J. Kitching, and L. Hollberg, Laser noise cancellation in single-cell CPT clocks, Proc. 2006 International School of Quantum Electronics (ISQE).
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A. Brannon, V. Gerginov, S. Knappe, J. Kitching, Z. Popovic, System-Level Integration of a Chip-Scale Atomic Clock: Microwave Oscillator and Physics Package, Proc. 2006 IEEE Multiconference on Electronics and Photonics.
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S. Knappe, V. Gerginov, V. Shah, A. Brannon, H.G. Robinson, L. Hollberg, and J. Kitching, Long-term Stability of Chip-Scale Atomic Clock Physics Packages, SPIE Proc. 2007 Optics and Photonics (Photonics West).
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S. Knappe, V. Shah, V. Gerginov, A. Brannon, L. Hollberg and J. Kitching, Long-term Stability of NIST Chip-Scale Atomic Clock Physics Package, Proc. 2006 Precise Time and Time Interval Meeting (PTTI).
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A. Brannon, V. Gerginov, V. Shah, S. Knappe, Z. Popovic, L. Hollberg and J. Kitching, Self-Injection Locking of a Low-Power Microwave Oscillator by Using 4-Wave Mixing in an Atomic Vapor, Proc. 2007 International Frequency Control Symposium (FCS) and European Frequency and Tine Forum (EFTF), 275-278.
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V. Shah, S. Knappe, L. Hollberg, J. Kitching, Generation of coherent population trapping resonances with nearly 100 % transmission contrast, Proc. 2007 International Frequency Control Symposium (FCS) and European Frequency and Tine Forum (EFTF), 1339-1341.
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S. Knappe, V. Shah, A. Brannon, V. Gerginov, H.G. Robinson, Z. Popovic, L. Hollberg and J. Kitching, Advances in Chip-Scale
Atomic Frequency References at NIST, Proc. 2007 SPIE Conf., 6673. -
E. J. Eklund, A. M. Shkel, S. Knappe, E. Donley, J. Kitching, Spherical Rubidium Vapor Cells Fabricated by Micro Glass Blowing,
Proc. IEEE MEMS 2007, pp. 171-174, Kobe, Japan, January 21-25, 2007. -
M.P. Ledbetter, I.M. Savukov, D. Budker, V. Shah, S. Knappe, J. Kitching, S. Xu, D. Michalak, and A. Pines, Optical Microchip
Detection of Nuclear Magnetic Resonance, Proc. 2008 Conf. Lasers and Electro-Optics. -
K. Watabe, T. Ikegami, A. Takamizawa, S. Yanagimachi, S. Ohshima, S. Knappe, Dark Resonance in Bichromatic Linearly Polarized
Optical Field on Cs D1 Line, Proc. 2008 Intl. Freq. Cont. Symp., 107-9 -
J. Kitching, S. Knappe, V. Shah, P.D. Schwindt, W.C. Griffith, R. Jimenez, J. Preusser, L.A. Liew, and J.M. Moreland,
Microfabricated Atomic Magnetometers and Applications, Proc. 2007 IEEE Intl. Freq. Cont. Symp., 789-794. -
W.C. Griffith, R. Jimenez, V. Shah, S. Knappe, and J. Kitching, Improved Sensitivity of a Miniature Atomic Magnetometer by use
of Magnetic Flux Concentrators, Proc. 2008 Europ. Magnetic Sensors and Actuators Conference (EMSA). -
J. Preusser, V. Gerginov, S. Knappe, and J. Kitching, A microfabricated photonic magnetometer, Proc. 2008 IEEE Sensors.
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M.A. Perez, U. Nguyen, S. Knappe, E. Donley, J. Kitching, A.M. Shkel, Rubidium Vapor Cell with Integrated Nonmetallic
Multilayer Reflectors, Proc. IEEE MEMS 2008, pp. 790-793, Tucson, AZ, USA, January 13-17, 2008. -
J. Kitching, S. Knappe, E.A. Donley, Y.J. Wang, E. Hodby, W.C. Griffith, A. Geraci, J. Preusser, T.C. Liebisch, H.G. Robinson, L.
Hollberg, P.D. Schwindt, V. Gerginov, B. Lindseth, M. Eardley, R. Jimenez, and V. Shah, Chip-scale atomic devices: precision
atomic instruments based on MEMS, Proc. 2008 7th Symposium on Frequency Standards and Metrology. -
J. Preusser, S. Knappe, J. Kitching, V. Gerginov, A microfabricated photonic magnetometer, Proc. 2009 European Frequency
and Time Forum jointly with International Frequency Control Symposium, Besancon, France, April 20-23, 2009, pp.
1180-1182. -
J. Preusser, S. Knappe, J. Kitching, and V. Gerginov, A microfabricated photonic magnetometer, Proc. 2009 Joint Mtg. IEEE
Intl. Freq. Cont. Symp. and EFTF Conf., pp. 1180-1182, 2009 -
J. Kitching, S. Knappe, W.C. Griffith, J. Preusser, V. Gerginov, P.D. Schwindt, V. Shah, R. Jimenez, Uncooled, Millimeter-Scale
Atomic Magnetometers with Femtotesla Sensitivity, Proc. 2009 IEEE Sensors Conf., pp. 1844-1847. -
R. Mhaskar, S. Knappe, and J. Kitching, Low-Frequency Characterization of MEMS-based Portable Atomic Magnetometer,
Proc. 2010 IEEE Intl. Freq. Cont. Symp., pp. 376-379. -
H. Korth, K. Strohbehn, F. Tejada, A. Andreou, S. McVeigh, J. Kitching, and S. Knappe, Chip-Scale Absolut Scalar
Magnetometer for Space Applictions, APL Technical Digest 28, 281 (2010). -
S. Knappe, J. Preusser, L. Trahms, and T.H. Sander, Herzschl盲ge durch Laserspektroskopie detektiert: Optische
Minimagnetometer, Physik in unserer Zeit 1, p. 7 (2011). -
S. Knappe, R. Mhaskar, J. Preusser, J. Kitching, L. Trahms, and T. Sander, Chip-scale room-temperature atomic magnetometers for biomedical measurements, Proc. IFMBE 37, 1330-1333 (2011).
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A.M. Benison, O. Alem, S. Knappe, J. Kitching, D.S. Barth, A micro-fabricated atomic magnetometer for magnetoencephalography of epilepsy. Program No. 314, Washington, DC: Society for Neuroscience (2014).
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S. Knappe, D. Sheng, O. Alem, and J. Kitching, Microfabricatd Optically-Pumped Magnetometers for Biomedical Applications, Proceedings of the Frequency Standards and Metrology Seminar (2015).
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J. Kitching, E. Donley, S. Knappe, M. Hummon, A. Dellis, J. Sherman, K. Srinivasan, V. Aksyuk, Q. Di, D. Westly, B. Roxworthy, A. Lal, NIST on a Chip: Realizing SI Units with microfabricated alkali vapor cells, Proceedings of the Frequency Standards and Metrology Seminar (2015).
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H. Korth, K. Strohbehn, F. Tejada, A. Andreou, J. Kitcning, S. Knappe, J. Lehtonen, S. London, and M. Kafel, Miniature absolute scalar magnetometer based on rubidium isotope 87Rb, Proceedings of the Measurement Techniques for Solar and Space Physics Conference (2015).
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S. Krzyzewski, S. Geller, A. Perry, D. Sheng, J. Kitching, S. Knappe, Chip-Scale Atomic Magnetometer Characterization, Proc. of the 21016 International Frequency Control Symposium.
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A. Perry, D. Sheng, S. Knappe, Microfabricated Optically-Pumped Magnetometer Arrays for Biomedical Imaging, Proc. of the SPIE, Photonics West Conference, 2017.
Book Chapters
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S. Knappe, Emerging Topics: MEMS atomic clocks, in Y. Gianchandani, O. Tabata, and H. Zappe, (eds.) Comprehensive Microsystems, 2007, Elsevier, Netherlands.
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S. Knappe and J. Kitching, Microfabricated Atomic Magnetometers, in D. Budker, D. F. Jackson Kimball, and M. V. Romalis, (eds.) Optical Magnetometry, Cambridge University Press.
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S. Knappe, T. Sander and L. Trahms, Chip-Scale Optically-Pumped Magnetometers for MEG, in Selma Supek and Cheryl J. Aine (eds.) Magnetoencephalography: From Signals to Dynamic Cortical Networks, Springer Verlag, Heidelberg, 2014.
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R. Jimenez-Martinez and S. Knappe, Microfabricated optically-pumped magnetometers in A. Grosz, M. Haji-Sheikh, and S. Mukhopadhyay (eds.) High Sensitivity Magnetometers, Springer Verlag, 2016
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S. Knappe, T. Sander and L. Trahms, Chip-Scale Optically-Pumped Magnetometers for MEG, in Selma Supek and Cheryl J. Aine (eds.) Magnetoencephalography: From Signals to Dynamic Cortical Networks, Springer Verlag, Heidelberg, 2018.